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Currently used dielectric elastomers do not have the ability to self-heal after detrimental events such as tearing or electrical breakdown, which are critical issues in relation to product reliability and lifetime. In this paper, we present a self-healing dielectric elastomer that additionally possesses high dielectric permittivity and consists of an interpenetrating polymer network of silicone elastomer and ionic silicone species that are cross-linked through proton exchange between amines and acids. The ionically cross-linked silicone provides self-healing properties after electrical breakdown or cuts made directly to the material due to the reassembly of the ionic bonds that are broken during damage. The dielectric elastomers presented in this paper pave the way to increased lifetimes and the ability of dielectric elastomers to survive millions of cycles in high-voltage conditions.

A controlled reaction schema for addition curing silicones leads both to significantly lower elastic modulus and lower viscous dissipation than for the chemically identical network prepared by the traditional reaction schema.

Organic-inorganic polyvinylidene fluoride (PVDF)-titanium dioxide (TiO 2 ) composite hollow fiber ultrafiltration (UF) membranes were prepared by TiO 2 solgel method and blending method, respectively. The membranes were characterized in terms of microstructure, hydrophilicity, permeation performance, thermal stability, and mechanical strength. The experimental results indicated that PVDF-TiO 2 composite UF membranes exhibited significant differences in surface properties and intrinsic properties because of the addition of inorganic particles. The TiO 2 particles improved the membrane strength and thermal stability of PVDF-TiO 2 composite UF membranes. In particular, hydrophilicity and permeability increased dramatically with the increase of TiO 2 , whereas the retention property of UF membranes was nearly unchanged. However, high TiO 2 concentration induced the aggregation of particles, resulting in the decline of hydrophilicity and permeability. Compared with PVDF-TiO 2 composite hollow fiber UF membranes prepared by TiO 2 blending method, PVDF-TiO 2 composite hollow fiber UF membranes prepared by TiO 2 sol-gel method formed a dispersed inorganic network, and the stronger interaction between inorganic network and polymeric chains led to TiO 2 particles being uniformly dispersed in UF membranes.

Alkyl chloride-functional siloxane copolymers are synthesised as the basis for a new soft matrix for dielectric elastomers.

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